Opening explorer
Walk any move order through the catalog: pick a book continuation and watch the board, or open the matching ECO lines on the side. By default move orders are strict — flip the toggle to group by position and pull in transpositions.
⚖ Grouping by position
Grouping by position: lines that reach this position by a different move order are included too.
1. e4 e6 2. d4 d5 3. Nd2 Nc6
◀ Undo move
♞ You have reached French Defense: Tarrasch Variation, Guimard Defense C03 — the catalogued line ends exactly here.
Matching openings 3
- French Defense: Tarrasch Variation, Guimard Defense, Main Line C04 2 plies deeper
- French Defense: Tarrasch Variation, Guimard Defense, Thunderbunny Variation C03 4 plies deeper
…and 1 more lines run through this position — keep making moves to narrow it down.
3810 catalogued lines in total · openings encyclopedia